php man page for stream_context_set_default

STREAM_CONTEXT_SET_DEFAULT(3)						 1					     STREAM_CONTEXT_SET_DEFAULT(3)

stream_context_set_default - Set the default stream context

SYNOPSIS
       resource stream_context_set_default (array  $options)

DESCRIPTION
	Set  the  default stream context which will be used whenever file operations (fopen(3), file_get_contents(3), etc...) are called without a
       context parameter. Uses the same syntax as stream_context_create(3).

PARAMETERS
	      o $options
		- The options to set for the default context.

	      Note

		     $options must be an associative array of associative arrays in the format $arr['wrapper']['option'] = $value.

RETURN VALUES
	Returns the default stream context.

EXAMPLES
       Example #1

	      stream_context_set_default(3) example

	      <?php
	      $default_opts = array(
		'http'=>array(
		  'method'=>"GET",
		  'header'=>"Accept-language: en
" .
			    "Cookie: foo=bar",
		  'proxy'=>"tcp://10.54.1.39:8000"
		)
	      );

	      $default = stream_context_set_default($default_opts);

	      /* Sends a regular GET request to proxy server at 10.54.1.39
	       * For www.example.com using context options specified in $default_opts
	       */
	      readfile('http://www.example.com');
	      ?>

SEE ALSO
       stream_context_create(3), stream_context_get_default(3), Listing of supported wrappers with context options ("Supported Protocols and Wrap-
       pers")..

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